distract readers from your content and cause them to bounce from your page

are out of your control and could hurt your brand and image

The timeless adage "There is no such thing as a free lunch" communicates the idea that it is impossible to get something for nothing.
In this case you pay for these "free comment services" through the direct sale of your privacy, content, and audience.

They also purposefully mislead your readers ...

Free commenting systems often have a cluttered and distracting user experience.
These distractions cause your visitors to bounce, but it gets worse ...

Most of the major "platforms" are actively trying to pull your readers away from your site!
You create original content and earn organic traffic while they skim off the top for their own gain.